Improvement in boiler-coverings



I v P. B. STEVENS. Boiler Covering.

No'. 209,937. I Pate nt ed Nov.- 12, 1878.

a. man; PHum-u'moeumm. WASHINGTON. a. c

UNITED STATES- PATENT QFFIGE.

FRANCIS B. STEVENS, OF HOBOKEN, NEW JERSEY.

IMPROVEMENT IN BOILER-COVERINGS.

Specification forming part of Letters Patent No- 209,937, dated November 12,- 1878; application filed April 15, 1878.

To all whom it may concern.-

Be it known that I, FRANCIS B. STEVENS, of H oboken, in the State of New Jersey, have in vented an Improvement in Boiler-Ooverin gs, of which the following is a specification:

My invention consists in an improvement on the boiler-covering described in Letters Patent granted to me November 2, 1875, and numbered 169,492; December 19,1876,nu1nbered 185,460; and May 29, 1877, numbered 191,262.

Figure 1. is a top view of a portion of a hollow metallic section for boiler-covering. The width of this hollow section is twelve inches, and the length of the portion shown is nine and three-fourths inches; but it can be con-' venient-ly made as long as eight feet. Fig. 2 is an end view of Fig. 1. Fig. 3 is a section taken through the dotted line as a: of Fig. 1.

A is the piece of metal that forms the inner surface of the section. B is the piece of thin sheet metal that forms the outer surface of the hollow section. 0 is the sheet metal that forms the edges of the hollow section, the bottom edges of which are E E. G is a portion of the outer surface of a boiler, O 0, including i the rivet-heads.

My improvement consists in adding a covering of thin metal in sheets, and in interposing this covering F F between the hollow me tallic sections and the portion of the surfac of the boiler to be covered, and in making thi covering F F rest on't-he rivet-heads or projections of the surface of the boiler, and also in making the edges E E of the hollow sections rest on the covering F F. By this means a more even surface will be presented for the hollow sections to rest on, and the heat will be better retained.

I claim as my invention In a boiler-covering, the hollow section of metal formed by the inner sheet of metal, A, the outer sheet of metal, B, and the side sheets of metal, 0 (l, with the projecting flanges E E, in combination with the thin sheet metal F F, interposed between the hollow sections and the boiler.

FRANCIS B. STEVENS.

Witnesses Y L. W. BROWN,

F. AIGELTINGER. 

